/*body{border:1px solid darkviolet;}*/
#all{
    width: 600px;
    margin: 0 auto;
}
#top{
    border: 1px solid plum;
    height: 60px;

}
/*#top img:nth-child(1){*/
/*    display: block;*/
/*    height: 50px;*/
/*    position: absolute;*/
/*    margin: 9px 0 0 460px;*/
/*}*/
#top img:nth-child(1){
    display: block;
    height: 50px;
    position: absolute;
    margin: 9px 0 0 520px;
}
#top div{
    border:1px solid gray;
    width: 150px;
    line-height: 45px;
    text-align:center;
    background:gray;
}
#top div:nth-child(3){
    background-color: darkgray;
     margin: 14px 0 0 50px;
 }
#top div:nth-child(4){
    background-color: darkgray;
    margin: -47px 0 0 250px;
}
#ipt1,#ipt2{cursor: pointer;}
#mid{
    border: 1px solid darkblue;
    height: 210px;
}
#mid div:nth-child(1){
    margin:0 30px 0 0;
    display: block;

}
#mid div:nth-child(2){
    display:none;
}
#mid div:nth-child(3){
    margin:30px 0 0 0;
    border:1px solid darkgray;
    height: 50px;
}
#btn1{
    margin-left: 20px;
}
#mid #btn2{
    height: 25px;
    margin-top: 10px;
    margin-left: 380px;
    padding:0 0 0 16px;
    background:url("../image/sx.png")no-repeat;
}
#bot{
    border: 1px solid darkviolet;
    height: 240px;
    background: url("../image/ax.png");
}
#bot #div3,#div4{
    display: none;
}